Gearing.



CFL

GEARING.

modica Specification of Letters latent.

iatented Dec., i916.

Application led March 1, 1915. Serial No. 11,402.

ToaZZ lIJ/tom 'it may conce/m Be it known that l, OsKAn voN Boi-loszuwicz, citizen of Lbeck, Germany, residing at Lornseustrasse 26, Kiel, Germany, have invented certain new and useful' Improvements in Gearing, ot'which the following is a specification. 1

This invention relates to a novel and improved type of gearing, and has particular reference to gearing in which the' torsion in the driving or driven pinions is reduced much as possible by the peculiar manner in which the power is supplied to, or taken from, i them.

t has been previously known in the'art to cause a rotating power to act between the sections of divided pinion, so that the tor sion is distributed over the two halves. 4

It is the ohject of the prese-nt invention to reduce the torsional strain in proportion to the power which is supplied to or taken from such a type of gearing, the invention consisting' substantially-in applying the power to, or taking it from the middle, or approximately the middle, of each pinion haii or section.

One forni of the invention is shown in the accompanying drawings, in which the figure I is an elevation' of the gearing, shown'partly in section.

ln said drawings, m which two sets of pinions are shown, one of which may he used to supply power, and the other to distribute power from a large intermediate member, W represents a pinion shaft' journaled in bearings L, and carrying .the identical pinion sections or halves H. Said pinion halves or sections H are provided with oblique or diagonal teeth oi? comparatively large width., the "teeth on the pinions being disposed in opposite directions and .meshing with corresponding teeth upon the lauree divided. 0'ear elements. In the u' )er set, the pinion sections or halves H are shown formed as integral elements of the pinion shaft W', and said shaft W' is formed in sections which are coupled, hy means of the coupline' EL As indicated in the lower half of the drawings, the pinion shaft Vf may he a one-piece element, and the pinion sections t may loe suitably mounted thereon.

The pinion sections or halves H are connected to the shaft W only at the' middle portion Z, this middle portion consisting of a comparatively thin web, so that the' free quently, only parts Z are distorted relatively to the two ends E of each of the pinion halves or sections H. There is, therefore, no torsion of the ends E relative to one another. Since each of the ends E of the pinion sections H only has to carry the burden of a half iof the torque or rotating moment, which is supplied to the respective pinions H, then the specific torsion, that is the tor# sional arc referred to the unit length of the aXis and the radius, is one half of that which' would appear if the torque were to loe applied at one end of half. Furthermore, the specific torsion only acts on one half of the width ot' the pinion section H. The actual torsion at the point Z at which the power acts is, relative to the ends E of the particular pinion section or half, only one quarter of that of the above mentioned arrangement, where applied at one end.

For special purposes, the place on the sections a't which the power acts may be removed to any desirable distance from the ymiddle of each pinion half or section, and

the pinion section or.

the power is pinion-sections H, the 4power acts only at the parts Z. Consethe pinion halt may he made of dilierent length. The torsion then varies pro rata with the respective lengths.

At is true of every typeert pinion that the maximum tooth pressure occurs at the place where the torque acts, and in ,the present invention the power is applied at the middle of each pinion section. For this reason, that the tooth section bends and yields to the tooth pressure, which is greater at the point Z than at the ends E, the contact of the teeth is improved. Pinions, in which the torque acts at one end of the pinion only cannot yield to the greater tooth pressure at that point, hecause they are held at the ends by hearings.

rlhe uniform distributions of the torque on both pinion sections or halves is secured by the opposite disposition of the angles of the teeth, and by the axial dispiaceahility viodo of the pinions. rlhe torsion in the Shaft connecting the pinion halves therefore has no eliect on the engagement of the teeth.

If, by the fact of the shaft of the pinion being obliquely disposed. to the Shaft of the large gear wheel, the tooth pressure is larger vat one end of the pinion half than at the other, this difference may be compensated with the present invention, since the ends are not rigidly secured to the pinion shaft which iS held in the bearings.

lVliat I claim isl. In a gearing, the combination of a pinion shaft, and'pinion sections of comparatively small dian'ieter and Wide teeth carried by said pinion shaft, said pinion sections tively small diameter, and having comparatively wide teeth, carried by said pinion shaft, said pinion Yhalves being connected to said pinion shaft by comparatively narrow Webs at the middles of the pinion halves.

3. In a gearing, the combination of a pinion shaft, pinion halves of comparatively small diameter carried by said shaft, comparatively large teeth formed on said pinion halves and disposed to extend at opposite anglesand comparatively narrow Webs con necting said pinion halves to said pinion shaft, the toothed portions of the pinion halves extending in Wide Hanges from each sidev of said web.

ln testimony whereof I have affixed my signature in presence of two Witnesses.

OSKAR v. BOHUSZEWICS. lVit-nesses:

JULIUS RJIKE, HERRMANN SoH'rr. 

